Quick easy questionFormula for angular diameter?

  • Thread starter Thread starter Soylentgreen
  • Start date Start date
  • Tags Tags
    Angular Diameter
AI Thread Summary
The discussion focuses on finding the formula for calculating angular diameter based on an object's distance and diameter, specifically expressed in arc seconds. Participants mention the need for a visual representation and trigonometric principles to aid understanding. Clarifications are provided on the definitions of arcminutes and arcseconds, emphasizing their relationship to degrees. The conversation highlights the importance of visual aids in grasping the concept. The thread seeks a clear, concise formula for practical application.
Soylentgreen
Messages
12
Reaction score
0
i am looking for the equation for angular diameter in relation to an objects distance and diameter.
i need it expressed in arc seconds, not radians.

anyone know it?
 
Astronomy news on Phys.org
Can you draw a picture and do some trig?
 
An arcmin is 1/60th of a degree and an arcesc is 1/60th of an arcmin. Can you draw a picture now...?
 

Thread 'Does it make sense to build new radio telescopes?'

TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
View full post »
Thread 'Could gamma-ray bursts have an intragalactic origin?'

Thread 'Could gamma-ray bursts have an intragalactic origin?'

This is indirectly evidenced by a map of the distribution of gamma-ray bursts in the night sky, made in the form of an elongated globe. And also the weakening of gamma radiation by the disk and the center of the Milky Way, which leads to anisotropy in the possibilities of observing gamma-ray bursts. My line of reasoning is as follows: 1. Gamma radiation should be absorbed to some extent by dust and other components of the interstellar medium. As a result, with an extragalactic origin, fewer...
View full post »

Thread 'Our Beautiful Universe - Photos and Videos'

This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...
View full post »

Similar threads

B Venus and Jupiter Conjunction
Replies
3
Views
185
I How Does Angular Diameter Distance Apply to the Last Scattering Surface?
Replies
2
Views
2K
I Diameter of a Galaxy: Calculate Distance/Arc Min?
Replies
9
Views
4K
B Asteroid 2024 YR4 has a 1% risk of a multi-megaton impact in 2032 (now ruled out)
Replies
30
Views
6K
B What keeps most galactic stars from falling into the centeral black hole?
Replies
6
Views
2K
Stargazing Calculating the Resolving power of a Telescope
Replies
7
Views
4K
How Is the Angular Diameter of Jupiter Measured and What Equipment Is Used?
Replies
2
Views
2K
How to Calculate Angular Diameter of a Galaxy with a Given Diameter?
Replies
2
Views
3K
Problem on thermal radiation and lenses
Replies
3
Views
1K
Stargazing What do stars actually look like from up close?
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top